Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481409
P. Bosshard, J. Lafond, F. Dubos, P. Lepeltier, E. Vourch, F. Delepaux, C. Labourdette, L. Martin, G. Navarre, C. Feat
Thales Alenia Space present a synthesis of on-going developments of MBA (Multiple Beams Antennas) concepts for HTS/V-HTS satellites applications. The main topics of interest address: 1. Ka and Q/V SFPB MBA Tx/Rx feeds for HTS system · 3 Ka Tx/Rx reflectors of 3m5 class · 1 Q/V Tx/Rx reflector of 2m4 class 2. Ka MFPB Tx/Rx MBA for HTS system · 2 Ka Tx/Rx reflectors of 3m5 class (beams of 0.3°) · 1 Tx/Rx 3m5 class (beams of 0.42°).
{"title":"Thales Alenia Space HTS/V-HTS Multiple Beam Antennas sub-systems on the right track","authors":"P. Bosshard, J. Lafond, F. Dubos, P. Lepeltier, E. Vourch, F. Delepaux, C. Labourdette, L. Martin, G. Navarre, C. Feat","doi":"10.1109/EUCAP.2016.7481409","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481409","url":null,"abstract":"Thales Alenia Space present a synthesis of on-going developments of MBA (Multiple Beams Antennas) concepts for HTS/V-HTS satellites applications. The main topics of interest address: 1. Ka and Q/V SFPB MBA Tx/Rx feeds for HTS system · 3 Ka Tx/Rx reflectors of 3m5 class · 1 Q/V Tx/Rx reflector of 2m4 class 2. Ka MFPB Tx/Rx MBA for HTS system · 2 Ka Tx/Rx reflectors of 3m5 class (beams of 0.3°) · 1 Tx/Rx 3m5 class (beams of 0.42°).","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75017359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481953
T. Zaboronkova, A. Kudrin, A. S. Zaitseva
We study the energy radiated from a circular loop antenna which is located on the surface of an axially magnetized plasma column in free space and excited by a given wideband pulsed voltage. The radiated energy and its distribution over the frequency and spatial spectra of the excited waves are derived and analyzed for some cases of interest.
{"title":"Radiation from a loop antenna located on the surface of a magnetized plasma column and excited by a wideband signal","authors":"T. Zaboronkova, A. Kudrin, A. S. Zaitseva","doi":"10.1109/EUCAP.2016.7481953","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481953","url":null,"abstract":"We study the energy radiated from a circular loop antenna which is located on the surface of an axially magnetized plasma column in free space and excited by a given wideband pulsed voltage. The radiated energy and its distribution over the frequency and spatial spectra of the excited waves are derived and analyzed for some cases of interest.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"345 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75113643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481126
L. Foged, F. Saccardi, F. Mioc, P. Iversen
Spherical Near Field (NF) measurements are widely used in order to accurately characterize the radiating performance of antennas. The main drawback of this type of measurement is the acquisition time that, depending on the electrical size of the Antenna Under Test (AUT), could be very long. This is due to the fact that, in order to correctly evaluate the Far Field (FF) with the NF/FF transformation [1]-[3], the NF has to be sampled over the full sphere with a sampling density that increases with the dimension of the so called AUT minimum sphere [3]. In many spherical NF measurement scenario, it is not possible to locate the AUT in the origin of the measurement sphere resulting in a larger minimum sphere, which implies a denser sampling and a longer acquisition time. An innovative NF/FF technique that allows to drastically reduce the samples density in offset spherical NF measurement is presented in this paper.
{"title":"Spherical Near Field offset measurements using downsampled acquisition and advanced NF/FF transformation algorithm","authors":"L. Foged, F. Saccardi, F. Mioc, P. Iversen","doi":"10.1109/EUCAP.2016.7481126","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481126","url":null,"abstract":"Spherical Near Field (NF) measurements are widely used in order to accurately characterize the radiating performance of antennas. The main drawback of this type of measurement is the acquisition time that, depending on the electrical size of the Antenna Under Test (AUT), could be very long. This is due to the fact that, in order to correctly evaluate the Far Field (FF) with the NF/FF transformation [1]-[3], the NF has to be sampled over the full sphere with a sampling density that increases with the dimension of the so called AUT minimum sphere [3]. In many spherical NF measurement scenario, it is not possible to locate the AUT in the origin of the measurement sphere resulting in a larger minimum sphere, which implies a denser sampling and a longer acquisition time. An innovative NF/FF technique that allows to drastically reduce the samples density in offset spherical NF measurement is presented in this paper.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"61 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76581533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481889
K. Atia Abdalmalak, S. Romano, E. Garcia, A. Garcia Lamperez, Francisco Javier Herraiz Martinez, M. Salazar Palma, Daniel Segovia Vargas, José Manuel Serna Puente, F. Tercero, Jose Antonio Lopez Perez, F. Colomer, J. A. López Fernández
The requirements for the VGOS (VLBI Global Observation System) [1] are: feed system covering the 2 to 14 GHz bandwidth and also working with high efficiency (> 50%). Universidad Carlos III de Madrid has developed a new topology to cover them. The new receiver topology is based on a log-spiral antenna printed on a conical surface. Two interesting characteristics are presented: the first one is the dual circular polarization compared with the dual linear polarization recorded in the state of the art [2]. The other comes from the fact that the new topology uses the self-complementary antenna concept, so constant and almost real part of input impedance is obtained, simplifying the design of Low Noise Amplifier (LNA.) An array of four elements is presented for getting all the mentioned requirements. A single ended LNA covering the whole band is also presented together with the proper balun for feeding the antenna.
{"title":"Radio astronomy ultra wideband receiver covering the 2–14 GHz frequency band for VGOS applications","authors":"K. Atia Abdalmalak, S. Romano, E. Garcia, A. Garcia Lamperez, Francisco Javier Herraiz Martinez, M. Salazar Palma, Daniel Segovia Vargas, José Manuel Serna Puente, F. Tercero, Jose Antonio Lopez Perez, F. Colomer, J. A. López Fernández","doi":"10.1109/EUCAP.2016.7481889","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481889","url":null,"abstract":"The requirements for the VGOS (VLBI Global Observation System) [1] are: feed system covering the 2 to 14 GHz bandwidth and also working with high efficiency (> 50%). Universidad Carlos III de Madrid has developed a new topology to cover them. The new receiver topology is based on a log-spiral antenna printed on a conical surface. Two interesting characteristics are presented: the first one is the dual circular polarization compared with the dual linear polarization recorded in the state of the art [2]. The other comes from the fact that the new topology uses the self-complementary antenna concept, so constant and almost real part of input impedance is obtained, simplifying the design of Low Noise Amplifier (LNA.) An array of four elements is presented for getting all the mentioned requirements. A single ended LNA covering the whole band is also presented together with the proper balun for feeding the antenna.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"34 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77603902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481738
J. A. Castiblanco, D. Seetharamdoo, M. Berbineau, M. Ney
In this paper, we address the problem of the modelling and analysing wave propagation in realistic tunnel environments using a numerical model. A 2.5 D TLM based modal algorithm is developed and used to model several tunnel environments, namely an arched tunnel, a metallic tunnel and loaded tunnels with traffic. To analyse wave propagation in these context, a modal nomenclmature is proposed. Depolarisation effects have been demonstrated for arbitrary cross-sections. This effect, often observed during measurement campaigns has been shown with a numerical model.
本文用数值模型对实际隧道环境中波浪的传播进行了模拟和分析。提出了一种基于2.5 D TLM的模态算法，并将其应用于几种隧道环境的建模，即拱形隧道、金属隧道和承载交通的隧道。为了分析这种情况下的波传播，提出了一种模态命名法。去极化效应已被证明适用于任意截面。在测量活动中经常观察到的这种效应已经用数值模型显示出来。
{"title":"Modal wave propagation characteristics in tunnels of different cross sections","authors":"J. A. Castiblanco, D. Seetharamdoo, M. Berbineau, M. Ney","doi":"10.1109/EUCAP.2016.7481738","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481738","url":null,"abstract":"In this paper, we address the problem of the modelling and analysing wave propagation in realistic tunnel environments using a numerical model. A 2.5 D TLM based modal algorithm is developed and used to model several tunnel environments, namely an arched tunnel, a metallic tunnel and loaded tunnels with traffic. To analyse wave propagation in these context, a modal nomenclmature is proposed. Depolarisation effects have been demonstrated for arbitrary cross-sections. This effect, often observed during measurement campaigns has been shown with a numerical model.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"34 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79440947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481505
A. Maltsev, I. Bolotin, A. Lomayev, A. Pudeyev, Maxim Danchenko
In this paper we investigate the mobility effects impact on the millimeter-wave (mmWave) communication system performance. At the first step we introduce the mobility model on the example of the pedestrian motion and discuss its parameters for different environments. The impact of mobility on the system performance is estimated by comparison of channel properties vs. mmWave IEEE 802.11ad system parameters. The considered channel characteristics are calculated on the base of the Quasi-Deterministic (Q-D) channel model developed in MiWEBA project and available experimental measurement data. It is shown that mobile pedestrian channel is frequency-selective but stationary on the signal frame duration. The long-term mobility impact on the communication system performance is investigated on the PHY layer for signal bandwidths 500-2000 MHz. It is demonstrated that the system with wider bandwidth demonstrates 2-4 dB gain over the narrow-band one.
{"title":"User mobility impact on millimeter-wave system performance","authors":"A. Maltsev, I. Bolotin, A. Lomayev, A. Pudeyev, Maxim Danchenko","doi":"10.1109/EUCAP.2016.7481505","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481505","url":null,"abstract":"In this paper we investigate the mobility effects impact on the millimeter-wave (mmWave) communication system performance. At the first step we introduce the mobility model on the example of the pedestrian motion and discuss its parameters for different environments. The impact of mobility on the system performance is estimated by comparison of channel properties vs. mmWave IEEE 802.11ad system parameters. The considered channel characteristics are calculated on the base of the Quasi-Deterministic (Q-D) channel model developed in MiWEBA project and available experimental measurement data. It is shown that mobile pedestrian channel is frequency-selective but stationary on the signal frame duration. The long-term mobility impact on the communication system performance is investigated on the PHY layer for signal bandwidths 500-2000 MHz. It is demonstrated that the system with wider bandwidth demonstrates 2-4 dB gain over the narrow-band one.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"19 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85214314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481824
A. Delgado
This paper presents a basic mathematical model to harvest energy from a magneto - gravitational system, i.e., a resonant circuit following an elliptical orbit around a constant source of magnetic field. The model is illustrated with simulations that modify two parameters, the orbital eccentricity and the angular velocity of the resonant circuit.
{"title":"Magnetically coupled resonator moving in elliptical orbit","authors":"A. Delgado","doi":"10.1109/EUCAP.2016.7481824","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481824","url":null,"abstract":"This paper presents a basic mathematical model to harvest energy from a magneto - gravitational system, i.e., a resonant circuit following an elliptical orbit around a constant source of magnetic field. The model is illustrated with simulations that modify two parameters, the orbital eccentricity and the angular velocity of the resonant circuit.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"48 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85243080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481262
B. Orazbayev, N. Estakhri, M. Beruete, A. Alú
Here we present the design and numerical results for an ultrathin unidirectional carpet cloak based on the restoration of the phase of the reflected wave. This ultrathin carpet cloak conceals a triangular surface bump with center height of 4.1 mm and tilt angle of 20 deg. The cloaking metasurface consists of an array of closed ring resonators, which allow an efficient phase manipulation along the edge of the bump. The numerical results at operation frequency f0 = 80 GHz demonstrate a good performance of the designed cloak in both near field and far field. The presented cloak has a thin, lightweight, and easy to fabricate design for radio and THz frequencies and can find applications in radar and antenna systems.
{"title":"Metasurface-based ultrathin carpet cloak","authors":"B. Orazbayev, N. Estakhri, M. Beruete, A. Alú","doi":"10.1109/EUCAP.2016.7481262","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481262","url":null,"abstract":"Here we present the design and numerical results for an ultrathin unidirectional carpet cloak based on the restoration of the phase of the reflected wave. This ultrathin carpet cloak conceals a triangular surface bump with center height of 4.1 mm and tilt angle of 20 deg. The cloaking metasurface consists of an array of closed ring resonators, which allow an efficient phase manipulation along the edge of the bump. The numerical results at operation frequency f0 = 80 GHz demonstrate a good performance of the designed cloak in both near field and far field. The presented cloak has a thin, lightweight, and easy to fabricate design for radio and THz frequencies and can find applications in radar and antenna systems.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"1 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85467802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481929
M. Schonhuber, M. Schwinzerl, G. Lammer
Precise knowledge on shapes of raindrops is required when predicting electromagnetic propagation parameters - in forward as well as in backscatter direction. The 2D-Video-Distrometer (2DVD) provides front and side view of each individual drop, obtained in continuous field measurements. Based on such data, in this study the reconstruction of the drops' 3D contour is presented, which is needed when calculating scattering amplitudes for actually measured raindrops.
{"title":"3D Reconstruction of 2DVD-measured Raindrops for Precise Prediction of Propagation Parameters","authors":"M. Schonhuber, M. Schwinzerl, G. Lammer","doi":"10.1109/EUCAP.2016.7481929","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481929","url":null,"abstract":"Precise knowledge on shapes of raindrops is required when predicting electromagnetic propagation parameters - in forward as well as in backscatter direction. The 2D-Video-Distrometer (2DVD) provides front and side view of each individual drop, obtained in continuous field measurements. Based on such data, in this study the reconstruction of the drops' 3D contour is presented, which is needed when calculating scattering amplitudes for actually measured raindrops.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"25 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85616576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481541
A. Zaman, P. Kildal
In this work, we present several gap waveguide planar array antennas for millimeter wave point to point communication systems. The antennas are designed using groove gap waveguide, ridge gap waveguide and inverted microstrip gap waveguide technology. All these three antenna designs are based on the cavity-backed slots as the core radiating elements. There exists a coupling slot in the cavity layer which allows the excitation of the radiating slot elements using three different types of feeding waveguide section. The designed three antennas have 16×16 radiating slot elements and these antennas operate over 15% relative bandwidth from 57-66GHz frequency range with -13 dB reflection coefficient. The simulated directivity for these slot arrays are about 33.3 dBi at the center of the band.
{"title":"Different gap waveguide slot array configurations for mmwave fixed beam antenna application","authors":"A. Zaman, P. Kildal","doi":"10.1109/EUCAP.2016.7481541","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481541","url":null,"abstract":"In this work, we present several gap waveguide planar array antennas for millimeter wave point to point communication systems. The antennas are designed using groove gap waveguide, ridge gap waveguide and inverted microstrip gap waveguide technology. All these three antenna designs are based on the cavity-backed slots as the core radiating elements. There exists a coupling slot in the cavity layer which allows the excitation of the radiating slot elements using three different types of feeding waveguide section. The designed three antennas have 16×16 radiating slot elements and these antennas operate over 15% relative bandwidth from 57-66GHz frequency range with -13 dB reflection coefficient. The simulated directivity for these slot arrays are about 33.3 dBi at the center of the band.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"7 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85617913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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